Of course, the series has become immensely popular, selling more than 100 million copies and claiming fans all over the world, including Taylor Swift.

"She asked if she could use the book in a video, and I thought, 'The book is too famous! I just don't want it to be any more famous, please!" she says.

Swift appears on the Fifty Shades Darker soundtrack and just released the music video for "I Don't Wanna Live Forever" with Zayn Malik last week. The video rivals the movie in sultriness, which James assured us is at an all-time high in the film.

"They brought it 110 percent. It's hot," James said of stars Jamie Dornan and Dakota Johnson. "They're really good sports and they threw themselves into it."

In the movie, Anastasia (Johnson), meets the women who stole Christian's (Dornan) heart before her, who is played by Kim Basinger.